that regardless of whether collection is from young or old trees, the 

 viability of seed may not deteriorate below an average of 44.7 percent 

 if storage has been above ground or below ground (in air-tight con- 

 tainers) where annual temperatures range from approximately 30° to 50° 

 F.; that regardless of age of parent trees the viability of seed may 

 not fall below 56.7 percent if storage has been at constant tempera- 

 tures of 320 or 0° F. They indicate further that 32° and Oo F. storage 

 were (highly) significantly superior to root cellar and to underground 

 storage, but that neither 32° and 0° F. nor root cellar and under- 

 ground storage methods were significantly dissimilar, and that only 

 seed from scattered old growth (5,500 ft.) showed significant dif- 

 ferences from the other five sources. The significance of interaction 

 between origins and storage methods suggests that viability can be in- 

 fluenced by origin, depending on the storage method, and that this is 

 most pronounced (statistically significant) for seed from the first 

 four origins and for underground storage. 



While no general conclusions can be drawn from this limited test, 

 the results do suggest that ponderosa pine seed for use in artificial 

 regeneration in central Idaho might best be collected from young 

 stands, either open or normal, and stored at either 32° or 0° F., 

 preferably the former. 



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